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polarssl/docs/3.0-migration-guide.d/split_config.md
Bence Szépkúti 90b79ab342 Add migration guide and changelog 
Signed-off-by: Bence Szépkúti <bence.szepkuti@arm.com>
2021-06-28 09:28:48 +01:00

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Introduce a level of indirection and versioning in the config files

config.h was split into build_info.h and mbedtls_config.h. build_info.h is intended to be included from C code directly, while mbedtls_config.h is intended to be edited by end users whishing to change the build configuration, and should generally only be included from build_info.h. This is because all the preprocessor logic has been moved into build_info.h, including the handling of the MBEDTLS_CONFIG_FILE macro.

Mandatory version symbols were introduced for MBEDTLS_CONFIG_FILE and MBEDTLS_USER_CONFIG_FILE, MBEDTLS_CONFIG_VERSION and MBEDTLS_USER_CONFIG_VERSION respectively. Both config files should include a definiton of their respective version symbol, with a value of 1 to be considered valid.